1. Introduction
The First Alert SMCO410 Z-Wave Battery-Powered Smoke Detector & Carbon Monoxide Alarm provides advanced protection for your home and family. This device combines smoke and carbon monoxide detection into a single unit, offering comprehensive safety. Featuring Z-Wave Plus certification, it seamlessly integrates with compatible smart home systems, such as the Ring Alarm Base Station, to deliver real-time alerts and notifications, whether you are home or away. This manual provides essential information for the proper installation, operation, and maintenance of your alarm.
2. Important Safety Information
Please read this manual thoroughly before installation and operation. Failure to follow these instructions may result in property damage, injury, or death. Keep this manual for future reference.
- This alarm is designed for residential use only.
- Do not paint the alarm. Paint can clog the sensing chambers and prevent the alarm from operating properly.
- Do not install in locations where the temperature is below 40°F (4.4°C) or above 100°F (37.8°C).
- Do not install in areas of high humidity, such as bathrooms or near dishwashers.
- Test the alarm weekly to ensure proper function.
- Never ignore any alarm. Investigate the cause immediately.
- This device is not intended to substitute for proper installation, use, and maintenance of fuel-burning appliances, including appropriate ventilation and exhaust systems.
3. Product Overview
The First Alert SMCO410 is a compact, battery-powered device designed for dual detection of smoke and carbon monoxide. Its advanced features ensure reliable performance and seamless integration with your smart home security system.

Figure 3.1: Front view of the First Alert SMCO410 Z-Wave Smoke and Carbon Monoxide Alarm. This image shows the white, circular device with a central test/silence button and indicators for CO, Smoke, and Power.
Key Features:
- 2-in-1 Protection: Detects both smoke and carbon monoxide.

Figure 3.2: Illustration highlighting the 2-in-1 protection feature, showing icons for smoke, fire, and carbon monoxide detection.
- Z-Wave Plus Certified: Enables wireless communication with compatible smart home hubs.

Figure 3.3: Image displaying the Z-Wave Plus logo and "Works with Ring" logo, indicating compatibility with Ring Alarm Base Station for remote notifications.
- 10-Year Sealed Battery: Provides continuous power for the life of the alarm, eliminating the need for battery replacements and low battery chirps for a decade.

Figure 3.4: Visual representation of the alarm and its mounting plate, emphasizing the "No Battery Replacements" feature with a battery icon crossed out.
- Precision Detection Technology: Advanced sensing technology reduces nuisance alarms from cooking while providing early warning of actual fire emergencies.

Figure 3.5: Graphic illustrating the "Precision Detection" technology, showing icons for "Early Warning" (burning couch) and "Less Nuisance" (cooking pan).
- End-of-Life Warning: Alerts you when the unit needs to be replaced after 10 years of operation.
- Test/Silence Button: Allows for easy testing of the alarm and silencing of nuisance alarms.
4. Setup & Installation
4.1 Recommended Placement
For optimal protection, install smoke and carbon monoxide alarms on every level of your home and in every bedroom. Consider placing additional alarms in hallways and living areas.

Figure 4.1: Diagram showing recommended placement of smoke and CO alarms throughout a multi-story home, including bedrooms, hallways, living room, kitchen, and basement.
Avoid placing alarms:
- Within 20 feet of a furnace or fuel-burning appliance.
- Near air vents, fans, or doors that could interfere with smoke/CO reaching the alarm.
- In extremely dusty, dirty, or greasy areas.
- In direct sunlight or areas subject to extreme temperature changes.
4.2 Mounting the Alarm
- Select a suitable location on a ceiling or wall, following the recommended placement guidelines.
- Twist the mounting bracket off the alarm unit.
- Position the mounting bracket on the ceiling or wall and mark the screw holes.
- Drill pilot holes if necessary and insert wall anchors (if included or required for your surface).
- Secure the mounting bracket using the provided screws.
- Align the alarm with the mounting bracket and twist clockwise until it locks securely into place.
4.3 Z-Wave Pairing with Ring Alarm Base Station
To integrate your First Alert SMCO410 alarm with your Ring Alarm Base Station, follow these steps:
- Ensure your Ring Alarm Base Station is powered on and in setup mode (refer to your Ring Alarm manual for specific instructions).
- On the First Alert SMCO410, press and hold the Test/Silence button for approximately 5 seconds until the LED indicator flashes. This puts the alarm into Z-Wave pairing mode.
- Follow the prompts in your Ring app to add a new Z-Wave device. The app should detect the alarm.
- Once successfully paired, the alarm's LED indicator will stop flashing and remain solid for a few seconds, then turn off. The Ring app will confirm the successful addition of the device.
- Test the alarm after pairing to ensure it communicates with the Ring Base Station.
Note: Ring Alarm or Ring Alarm Pro Security Kit with Alarm Smoke and CO Listener is required for full integration and remote notifications.
5. Operation
5.1 Testing Your Alarm
It is crucial to test your smoke and carbon monoxide alarm weekly to ensure it is functioning correctly.
- Press and hold the Test/Silence button on the front of the alarm.
- The alarm will sound a series of beeps and flashes, indicating that both the smoke and CO sensors are working.
- Release the button. The alarm will stop sounding.
- If the alarm does not sound during the test, refer to the Troubleshooting section.
5.2 Understanding Alarm Signals
| Signal Type | Audible Pattern | LED Indicator | Meaning |
|---|---|---|---|
| Smoke Alarm | 3 long beeps, pause, 3 long beeps | Red LED flashes rapidly | Smoke detected. Evacuate immediately. |
| Carbon Monoxide (CO) Alarm | 4 quick beeps, pause, 4 quick beeps | Red LED flashes rapidly | Carbon Monoxide detected. Move to fresh air. |
| Low Battery Warning | 1 chirp every 60 seconds | Yellow LED flashes | Battery is nearing end of life. Replace the unit. |
| End-of-Life Warning | 5 chirps every 60 seconds | Yellow LED flashes | Unit has reached its 10-year lifespan. Replace immediately. |
| Malfunction/Error | Continuous chirping or irregular pattern | Yellow LED flashes | Alarm is malfunctioning. Refer to troubleshooting or replace. |
To silence a nuisance alarm (e.g., from cooking smoke), press the Test/Silence button. The alarm will silence for approximately 10 minutes before resetting. If the smoke or CO is still present, the alarm will reactivate.
6. Maintenance
6.1 Cleaning Your Alarm
Regular cleaning helps maintain the alarm's sensitivity and prevents false alarms caused by dust or debris.
- Clean your alarm at least once a month.
- Use a soft brush attachment on your vacuum cleaner to remove dust from the alarm's vents.
- Do not use cleaning solvents or sprays directly on the alarm.
- Do not paint the alarm.
6.2 End-of-Life Replacement
The First Alert SMCO410 alarm has a 10-year sealed battery and a 10-year operational life. After 10 years from the date of manufacture, the alarm will emit an end-of-life warning (5 chirps every 60 seconds with a flashing yellow LED). When this occurs, the entire unit must be replaced. Do not attempt to replace the internal battery.
7. Troubleshooting
If your First Alert SMCO410 alarm is not functioning as expected, refer to the common issues and solutions below:
| Problem | Possible Cause | Solution |
|---|---|---|
| Alarm chirps once every 60 seconds. | Low battery warning. | The 10-year sealed battery is nearing its end of life. Replace the entire alarm unit. |
| Alarm chirps 5 times every 60 seconds. | End-of-life warning. | The alarm has reached its 10-year operational life. Replace the entire alarm unit immediately. |
| Alarm sounds intermittently or false alarms. | Dust, debris, high humidity, or cooking fumes. | Clean the alarm as described in the Maintenance section. Relocate the alarm if it's too close to cooking appliances or high humidity areas. |
| Alarm does not sound during test. | Unit not activated or malfunction. | Ensure the alarm is properly twisted onto its mounting bracket to activate the battery. If it still doesn't work, the unit may be defective and needs replacement. |
| Cannot pair with Ring Alarm Base Station. | Incorrect pairing procedure, distance, or interference. | Ensure Ring Base Station is in pairing mode. Bring the alarm closer to the Base Station during pairing. Check for Z-Wave interference. Refer to Ring Alarm manual for Z-Wave device addition. |
If you continue to experience issues after attempting these solutions, please contact First Alert Customer Support.
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | SMCO410 (Part No. 1048325) |
| Detection Type | Photoelectric Smoke & Electrochemical Carbon Monoxide |
| Power Source | 10-Year Sealed Lithium-Ion Battery |
| Wireless Protocol | Z-Wave Plus |
| Compatibility | Ring Alarm Base Station (Ring Alarm or Ring Alarm Pro Security Kit with Alarm Smoke and CO Listener required) |
| Alarm Loudness | 85 dB at 10 feet |
| Operating Temperature | 40°F (4.4°C) to 100°F (37.8°C) |
| Operating Humidity | 10% to 95% Relative Humidity (RH) non-condensing |
| Dimensions (D x W x H) | 5"D x 2.12"W x 5"H |
| Weight | 9.9 ounces |
| Certifications | UL 217, UL 2034, Z-Wave Plus Certified |
9. Warranty & Support
9.1 Warranty Information
The First Alert SMCO410 Z-Wave Smoke Detector & Carbon Monoxide Alarm comes with a limited warranty. For detailed warranty terms, conditions, and duration, please refer to the official First Alert website or the warranty card included with your product packaging. Keep your proof of purchase for warranty claims.
9.2 Customer Support
If you have any questions, require technical assistance, or need to report an issue with your First Alert SMCO410 alarm, please contact First Alert Customer Support:
- Website: Visit the official First Alert website for FAQs, support articles, and contact forms.
- Phone: Refer to your product packaging or the First Alert website for the most current customer service phone number.
When contacting support, please have your product model number (SMCO410) and date of purchase readily available.






